For making heavy duty rigs and deep sea rigs. Customize your rig with 3 Crane Swivel Sleeves. Simply slide the sleeve onto your trace and crimp the sleeve to hold it in position. Then attach any sort of leader you want to the swivels to attach your hooks. Features - Smooth circular motion - Colour: Black Specifications - Crane Size: #4 - Sleeve Size: 1.6mm - Quantity Per Pack: 10 - Crane Size: #2 - Sleeve Size: 1.8mm - Quantity Per Pack: 10 - Crane Size: #1/0 - Sleeve Size: 2.3mm - Quantity Per Pack: 10 - Crane Size: #3/0 - Sleeve Size: 3.3mm - Quantity Per Pack: 10 - Crane Size: #4/0 - Sleeve Size: 3.8mm - Quantity Per Pack: 10